Earth moving device



31, 1933- J. 5. STEWART EARTH MOVING DEVICE Filed Dec. 1, 1952 2Sheets-Sheet '1' ATTORNEY Oct; 31, 1933. J. s. STEWART 1,932,608

0 EARTH MOVING DEVICE Filed Dec. 1, 1932 2 Sheets-Sheet 2 INVENTOR,

X ZEiM/M 4- ATTORNEY Patented Oct. 31, 1933 EARTH MOVING DEVICE James S.Stewart, Sidney, Ohio, assignor to The Slusser-McLean Scraper Company,

Sidney,

Ohio, acorporation of Ohio Application December 1,

6 Claims.

7 This invention relates to new and useful improvements in earth movingdevices.

It is one of the principal objects of my invention to provide for earthmoving tools, such as rippers, scrapers and the like, a simple, sturdyand efficient elevating device that is automatically controlled by theoperator.

My elevating device is particularly adapted for use in rippers as aneasy and efiicient automatic means for raising and lowering the ripperteeth. Smooth and positive in its operation, my elevating device makesitpossible. for the operator easily and quickly to drop the blades intothe ground and remove them therefrom.

It is another object of my invention to promote the solidity of theearth moving tool by cutting the ripper teeth out. of fiat high carbonsteel instead of employing bar steel bent to shape for this purpose. 7

Other important and incidental objects will be brought out in thefollowing specification and particularly set forth in the subjoinedclaims.

In the accompanying drawings-illustrating my invention, Figure 1 is aside elevational view of a ripper embodying my invention, showing theripper teeth in their normalelevated position, with the rack bars out ofengagement with the gears on the axle shaft. Figure 2 is a similar viewof the ripper, showing the ripper teeth after they have entered theground. Figure 3 is a top plan view of the ripper. And Figure 4 is asectional view taken through the ripper on the line 4-4 of Figure 3,showing the position of an elevating rack just before its joint-breakingroller has engaged a respective gear on the axle shaft.

Referring to the accompanying drawings for a detailed description of theform ,of embodiment of my invention disclosed therein, the numerals l,

1 designate the side members, and 2 the end members of a wheeled ripperframe. The side mem-- bers 1, 1 are bent inwardly at their outer endsfor connection by bolts 3 to the end member 2, and terminate at theirfront ends in inwardlyinclined portions 4, 4 to which longitudinal framemembers 5, 5 are secured. These latter members are formed at their endswith outwardly bent portions that are bolted to the end member 2. Twospaced center members 6, 6 parallel with 1 themembers 1, 1 and 5, 5 arebolted at their rear angle portionsto'the end member 2. U-shaped spacingelements 7 are boltedybetween the front ends of these longitudinalmembers.

Secured between the longitudinal members 1, 1 behind the center line ofthe machine, is a transverse member 8. Connected between the latter1932. Serial-No. 645,270

' and the end member 2 is a series of spaced toothof the tooth. Thesepins straddle the" bars 9 to relieve the bolts of the shearing strainsto which they are subjected when the, teeth are moved through theground.

Secured to the rear middle portions of the longitudinal members 1', lare two oppositely disposed bearing blocks 11, 11' fora transverse shaft12. Fixed to this shaft, one near each bearing block 11, are twov axlearms'is, 13 that carrybe'arings for a transverse shaft 14' to which tworoad wheels 15, 15'are fixedly secured. j j

The elevating and dropping mechanisin which I have provided for theripper te'eth"1"0'- will now be described. p Bolted to the end member2of the ripper frame is an angle support 16 to which one end of a link 17is secured by a pivotpin l8. Formed at the other'end' of this link is asector plate 19 having a series ofholes 20"near its curv'e'de'dge.'Pivoted to this plate by-a pin 21 is one end of a link 22 secured atits other end by. a pivot pinl23 to a crank arm 24 which is fixedlyattached t'o'"'the shaft 12.

The pivot pin '21 by1which the link 22 is secured to the link 17', isbelow the centerline' between the pivots 18 and 23. For the purpose ofbreaking the joint between the links lTand 223w permitlthe ripper teeth10 to descendby gr'avity'irito' the ground, I haveprovided'the'following handoperated means, although any other suitabledevice may be iemployedif'orthis' purpose if desired. The upper rightcorner portion ofthe sector por-, tion 19'of the link 1? is formed Witha b0'ss24 to receivea stub shaft .25. Secured to this shaft is aleverarm 26 and a foot member'2'7; While thelink joint remains unbroken, asshown in Figures 1 and .4, the foot member" 2'7 will rest upon the topedge of the link22. However, when the lever arm 26'is pulled to theright, through a medium such as the cord 28, theengag'ement' of the freeend of the foot member 27 with the link 22 will elevate the sectorportion 19 of the link 1'1 asufiicient distance to raise the pivot pin21 above center, whereupon the machine frame will drop to force theripper teeth 10 -into the ground, as shown in, Figure 2. The depthwhich" the ripper teeth 10 are permittedto penetrate the cable 45.

ground will be determined by the insertion of a pin 20 in a selectedhole 20 in the sector portion 19 of the link 17.

In Figure 2, this pin having been inserted in the second hole, willengage the lower edge of the link 22 to hold the ripper teeth 10 at thedepth indicated in that figure.

For the purpose of raising the ripper frame from its earth movingposition, I prefer the following means. Secured to the shaft 14, onenear each wheel 15, are two gears 29, 29. Adapted to be brought intoengagement with each gear 29 is a curved rack bar 30 that is fixedlysecured at its upper end to a transverse shaft 31 journaled in twoupwardly inclined bracket arms 32, 32 respectively.

Also secured to the shaft 31 is an arm 33 formed in its free end with ahole to receive the hook end of a helical spring 34 whose other end issecured to a rod 35. The lower end of this rod is adjustably secured tothe cross member 8 to vary the tension of the spring. By means of thelatter, the curved racks 30, 30 are held out of engagement with thegears 29, 29 respectively when the ripper frame is in its elevatedposition. (See Figures 1 and 4.)

For the purpose of forcing the rack bars 30 into engagement with theirrespective gears 29,

29, I preferably employ the following link and lever means. Secured toone of the longitudinal frame members 5 is a pivot block 36 to which abell crank lever 37 is pivoted. The link end 38 of this lever, ispivotally connected by a pin 39 between the upper ends of two parallellinks 40, 40. These links terminate at their lower ends in slightlycurved portions to receive between them a roller 41 free to turn on apin 42; Just 'above the roller the links' 40, 40 straddle, and varepivotally connected to the reduced lower end of the adjacent rack bar30 by a pin 43. Bridging the upper ends of the links e0, 40 is astop'member 44 to engage the link end 38 of the bell crank lever 3'7when the links are straightened out, as shown in Figure 4.

When it is desired to raise the ripper teeth from the ground, the lever3'7 is pulled forwardly by the operator through a medium such as theThis will cause the links'38 and 40 to straighten out, thus forcing theracks 30, 30 into engagement with their respective gears 29, 29 on theground wheel shaft 14. The racks, will then be turned in the directionof the arrow in Figure 4 to raise the ripper frame to the position shownin said figure, at which time the roller 42 will engage its respectivegear 29 to break the joint between the links 38 and 40, whereupon thespring 34 will draw the free ends of the racks 30, 3'0 upwardly'to thepositions they occupy in Figures l and 2. The upward movement of theripper frame also forces the links 17 and 22 to the position they havein Figure 1.

, It will now be seen that I have provided for earth moving devices suchas rippers, scrapers and the like, a simple, quick and sturdy, automaticelevating'mechanism for the earth engaging tool. Means having the samecharacteristics are also employed for throwing the earth moving deviceinto the ground.

I do not wish to be limited to the details of construction andarrangement herein shown and described, and any changes or modificationsmay be made therein within the scope of the subjoined claims.

Having described my invention, I claim:

1. In an earth moving device, a frame, an

nesaco earth moving tool attached to said frame, a ground wheel shaftmounted on the frame for vertical movement, a gear on said shaft, aswing ing rack connected at one end to the frame, a link pivotallysecured to the rack, a second link pivotally secured to the first link,the joint between the links beingbroken when the rack is out ofengagement with the gear, and means for drawing the links into alinementwith each other to force the rack into engagement with the gear.

2. In an earth moving device, a frame, an earth moving tool attached tosaid frame, a ground wheel shaft mounted on the frame for verticalmovement, a gear secured to said shaft, a swinging rack connected at oneend to the frame, a pair of pivotally connected links adapted, when inalinement, to force the rack into engagement with the gear whereby theframe may be raised by the ground wheel shaft, a spring for returningthe rack to its normal position when the joint between said linksis'broken, and means carried by the lower end of the rack for engagementwith said gear to break said joint after the rack reaches the limit ofits travel in engagement I with said gear.

3. In an earth moving device, a frame, an earth moving tool attached tosaid frame, a ground wheel shaft mounted on the frame for verticalmovement, a gear secured to said shaft, a swinging rack connected at oneend to the frame, ai05 pair of pivotally connected links adapted, whenin alinement, to force the rack into engagement with the gear wherebythe frame may be raised by the ground wheel shaft, a spring forreturning the rack to its normal position when the 4. In an earth movingdevice, a frame, an earth moving tool attached to said frame, atransverse shaft journaled in said frame, a second shaft, ground wheelson the second shaft, arms fixedly secured to the first shaft andpivotally secured to the second shaft, a crank arm secured to the firstshaft, a link pivotally secured to the said crank arm and a second linkpivotally secured to the rear end of said frame, a pivot connecting thefree ends of said links below their center line when the links are inalinement, and means for breaking the joint between said links to permitthe earth moving tool to drop into the ground. 5. In an earth movingdevice, a frame, an earth moving tool attached to said frame, atransverse shaft journaled in said frame, a second shaft,

ground wheels on the second shaft, arms fixedly secured to the firstshaft and pivotally secured to engagement with the other link to breakthe joint between said links to permit the earthmov-ing tool to dropinto the ground.- 7

6. In an earth moving device, aframe, an

' earth moving tool attached to said frame, a

transverse shaft j ournaled in said frame, a second shaft, ground wheelson the second shaft, arms fixedly secured to the first shaft andpivotally secured to the second shaft, a crank arm secured to the firstshaft, a link pivotally secured to the said crank arm and a second linkpivotally secured to the rear end of said frame, a pivot'connecting thefree ends of said links below their center line when the links are inalinement, means for breaking the joint between said links JAMES S.STEWART.

